Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4746027593a8a34bc14ad8e00d8866f778891b0df867ef2460f0700cc357830' 
  AND token = 'y2TFOhEqETBnIggfISsDBqNUibQ0nJRZeRT0s/Dze8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}